US5931492A - Airbag apparatus - Google Patents

Airbag apparatus Download PDF

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Publication number
US5931492A
US5931492A US09/089,486 US8948698A US5931492A US 5931492 A US5931492 A US 5931492A US 8948698 A US8948698 A US 8948698A US 5931492 A US5931492 A US 5931492A
Authority
US
United States
Prior art keywords
container
snap fastener
accordance
airbag apparatus
steering wheel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US09/089,486
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English (en)
Inventor
Frank Mueller
Gerhard Klingauf
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Takata Europe Vehicle Safety Technology GmbH
Original Assignee
Takata Europe Vehicle Safety Technology GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Takata Europe Vehicle Safety Technology GmbH filed Critical Takata Europe Vehicle Safety Technology GmbH
Assigned to TAKATA (EUROPE) VEHICLE SAFETY TECHNOLOGY GMBH reassignment TAKATA (EUROPE) VEHICLE SAFETY TECHNOLOGY GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KLINGAUF, GERHARD, MUELLER, FRANK
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Publication of US5931492A publication Critical patent/US5931492A/en
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Expired - Fee Related legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
    • B60R21/203—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in steering wheels or steering columns
    • B60R21/2035—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in steering wheels or steering columns using modules containing inflator, bag and cover attachable to the steering wheel as a complete sub-unit
    • B60R21/2037—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in steering wheels or steering columns using modules containing inflator, bag and cover attachable to the steering wheel as a complete sub-unit the module or a major component thereof being yieldably mounted, e.g. for actuating the horn switch or for protecting the driver in a non-deployment situation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q5/00—Arrangement or adaptation of acoustic signal devices
    • B60Q5/001—Switches therefor
    • B60Q5/003—Switches therefor mounted on the steering wheel

Definitions

  • the invention relates to an airbag apparatus particularly, one having a container having a base to which there is a gas generator secured. A folded airbag is secured and accommodated in the container. There is also a snap fastener secured to the bottom of the container and adapted for latching directly to a bore in the steering wheel.
  • the container also has an intended point of separation.
  • One such airbag apparatus is known from EP 0 694 442 in which a air bag is centrally secured to the steering wheel of a motor vehicle so that the gas bag, which inflates after of the container breaks open when accident-dependent accelerations arise, is located in an ideal position relative to the driver.
  • the container containing the folded-together gas bag is secured in an axially resilient manner to the steering wheel with contact pairs between the gas bag container and the steering wheel permitting the current circuit for the horn to be closed on resilient depression of the container relative to the steering wheel.
  • the container of the gas bag can also serve as the actuating knob for the vehicle horn.
  • a problem with such airbag apparatuses lies in rapidly securing the gas bag container to the steering wheel in a manner which is, nevertheless, so reliable that there is no danger of a full release of the container from the steering wheel, even when the gas generator is removed.
  • the object of the invention is to provide an airbag apparatus of the initially named kind, which can be secured in the simplest manner to the vehicle steering wheel but which, nevertheless, precludes any danger of the airbag apparatus releasing from the vehicle steering wheel in the event the gas generator is triggered as a result of accident-dependent accelerations.
  • an airbag apparatus having a container having a basic to which there is a gas generator secured. A folded airbag is secured and accommodated in the container. There is also a snap fastener secured to the bottom of the container and adapted for latching directly to a bore in the steering wheel, the container also has an intended point of separation.
  • the attachment of the container which can be broken open and which contains the gas bag and the gas generator, has a snap fastener connection known per se in which the snap fastener is simply pushed sufficiently far into suitable bores, in particular in the spokes of the steering wheel, such that they come into a snap-fastening engagement with the steering wheel and are thus automatically latched against being pulled out.
  • the snap fasteners are resiliently yieldable as a result of their function, a certain danger exists that the snap fasteners will release despite their latching at the edge of the bore in the steering wheel when a high loading arises due to triggering of the gas generator,. This is prevented by the position of intended separation, in particular the position of intended fracture provided in accordance with the invention.
  • the part of the snap fastener which remains in the bore of the steering wheel after the intended separation, then serves as an abutment for the holding means.
  • connection of the gas bag container to the steering wheel preferably takes place in such a way that one bore for an associated fastener for the gas bag container is provided in each spoke of the steering wheel.
  • three attachment means in accordance with the invention are thus arranged at the base of the gas bag container and can in each case be snapped into an associated bore in a spoke of the steering wheel.
  • the design in accordance with one of the preferred embodiments allows the gas bag container, which can be attached directly in bores of the steering wheel without problem, to simultaneously be used as the horn a citation means.
  • the snap fastener of plastic includes.
  • the manufacture of a plastic snap fastener has the further advantage that the steering wheel is electrically insulated from the metallic parts of the container, with it being possible to mount the horn contacts without regard to electrical insulation at the container or at the steering wheel.
  • plastic in particular in conjunction with the resetting spring, also avoids fluttering of the airbag arrangement at the steering wheel.
  • the snap fastener sleeve in accordance with the invention also ensures a good linear guidance of the container at the steering wheel during the relative movement when honking the horn.
  • the use of plastic also ensures that the airbag apparatus of the invention is not noisy and is service-free.
  • the snap fastener of the invention in particular the snap fastener hooks, needs only be sufficiently firmly designed and shaped that it prevents the container from being pulled off from the steering wheel by chance or in an unauthorized manner, and in other respects in such a way that it can reliably withstand the resetting spring force.
  • the holding pin which only then comes into action for the first time, takes on the task of securing the container or the container base to the steering wheel so that no danger exists that the container with the inflated gas bag will move around within the passenger compartment in an uncontrolled manner.
  • the resetting spring provided between the container, or the snap fastener sleeve, and the steering wheel has a double function in as much as it, on the one hand, brings the snap fastening means, in particular the snap fastening hooks, into rattle-free engagement with the rim of the bore of the steering wheel, and, on the other hand, permits the operation of the gas bag container as a horn actuating knob.
  • the spreading element which ensures the fixation of the snap fastener means in the latched position, in one preferred embodiment is manufactured of metal.
  • FIG. 1 a schematic plan view of a vehicle steering wheel with an airbag apparatus in accordance with the invention arranged thereon,
  • FIG. 2 an enlarged schematic side view on the line II--II in FIG. 1,
  • FIG. 3 an enlarged section of a sectional view of an airbag apparatus in accordance with the invention in the region of the attachment to a spoke of a steering wheel,
  • FIG. 4 a similar sectional view of a further embodiment
  • FIG. 5 a schematic sectioned side view of an airbag apparatus in accordance with the invention in the region of one of several fastener means prior to the installation in a vehicle
  • FIG. 6 a corresponding sectional side view of the airbag apparatus of FIG. 5 after being snapped into a spoke of a steering wheel
  • FIG. 7 a sectioned schematic side view analogous to FIGS. 5 and 6 after the triggering of the gas generator and the rupture of the position of intended fracture in accordance with the invention which has thereby taken place.
  • a container 11 including, for example, plastic and having a cover 32, which can be broken open, has a base 12 which is formed on a trough-like sheet metal part 33.
  • a gas generator 13 is secured in a central bore 34 of the sheet metal part 33 and on being triggered, in the case of accident-dependent accelerations of the vehicle, permits gas to flow out through gas outlet openings 35.
  • This gas inflates a gas bag 14 accommodated in a folded together state in the interior of the container 11 after the breaking open of the cover 32 for the protection of the driver.
  • the gas bag 14 has a central opening in a peripheral region which is, for example, clamped to the trough-like sheet metal part 35 by means of a sheet metal counterpart 36 so that the inner space of the gas bag 14, which stands in flow connection with the gas outlet opening 35, is largely sealed off towards the outside, apart from the non-illustrated outflow openings.
  • the steering wheel 16 has three spokes. Bores or bores with running ramps, 17 are provided in each spoke close to the central axis 37. A fastener or attachment means 15 is attached to the base 12 of the container 11 and is engaged into the bores with a snap-fitted engagement.
  • the fastening element 15 includes a snap fastener sleeve 18 having a ring-flange flange 31 at its end confronting the base 12 and a ring arrangement axially extending spring arms 38 in the end region remote from the ring flange 31.
  • the free ends of the spring arms 38 carry radially outwardly pointing snap-fitting hooks 21 which are respectively provided with radially outer run-in ramps 39.
  • a position of intended fracture 19 formed as a ring groove is located between the upper part 18' of the snap fastener sleeve 18 which adjoins the ring flange 31, and the part which carries the spring arms 38 and the snap fastener hooks 21.
  • the central bore of the snap fastener sleeve 18 has three regions, a larger diameter region 18a , which extends in the vicinity of the spring arms 38 and permits resilient inward deflection of the spring arms 38, a central guidance region 18b of smaller diameter for a central holding pin 20a including metal, and a further tapered end region 18c, which follows an inwardly projecting ring step.
  • the attachment spigots 26 have an outer thread in the described embodiment and extend through bores 25 in the base 12 of the container into the interior of the container 11, where nuts 27 are screwed on for the purpose of attaching the snap fastener sleeve 18 to the base 12.
  • the holding pin 20 has a spacing from the resilient arms 38 with the snap fastening hooks 21 on all sides such that the resilient arms 38 can be resiliently deflected radially inwardly to a sufficient degree.
  • the holding pin 20 has, at its end remote from the attachment spigot 26, a head 22 which that tapers towards the snap fastener sleeve 18 and cooperates with inclined surfaces 40 at the radially inwardly disposed sides of the snap fastening hooks 21.
  • the snap fastening hooks 21 contact the lower edges of the bores 17 in FIGS. 2 and 3 in such a way that the container 11 is secured to the steering wheel. This contact is ensured in that a compression coil spring 30 is provided between the flange 31 of the snap fastening sleeve 18 and the surface of the spoke of the steering wheel 16 facing the container 11 and keeps the container 11 and the steering wheel 16 at a separation determined by the snap fastening hooks 21.
  • Mutually insulated contacts 28 and 29 respectively are secured in the vicinity of each snap fastening sleeve 18 to the base 12 of the container 11 and to the spokes of the steering wheel 16 respectively, as can be seen in FIG. 2.
  • the mutually insulated contacts 28 and 29 have a separation from one another in the position of FIG. 2 but can enter into engagement on pressing the container 11 in the direction of the arrow in FIG. 2, with the spring 30 being compressed, and with the snap fastening hooks 21 lifting off from the associated retaining surface at the steering wheel 16. This movement can be exploited to close a horn current circuit.
  • the airbag apparatus including the snap fastener sleeves 18 and the holding pins 20 is pre-assembled, whereupon it has the appearance of FIG. 5. All components of the airbag apparatus are non-loosably arranged, i.e. they form a complete pre-assembled module, which can be handled as a unit prior to snap-fitting to the steering wheel and also thereafter.
  • the snap fastening sleeves 18 are pressed from above into the correspondingly provided bores 17 of the spokes of the steering wheel 16, with the run-in ramps 39 sliding along the run-in ramps of the bores 17 and thereby pressing the resilient arms 38 radially inwardly until the snap fastening hooks 21 pass through the bores 17.
  • the snap fastening sleeves 18 are now pushed into the bores 17 sufficiently far until the snap fastening hooks 21 can engage behind the lower rim of the bores 17 in FIGS. 2, 3 and 6 and can be transferred into this position by their inherent spring action. In this way the contact pairs 28, 29 automatically come into the relative position which can be seen from FIGS. 2 and 6, in which they lie opposite to one another with a spacing.
  • the airbag apparatus with the container 11 can thus be secured to the steering wheel 16 in the simplest manner.
  • the conical head 22 of the holding pin 20 finally comes into contact against the radially inner inclined surface 40 of the snap fastening hooks 21, and thus makes radially inward resilient deflection of the spring elements 38 impossible.
  • a problem-free axial support for the holding pin 20 is provided as a result of the spring elements 38 being pressed radially outwardly at the periphery of the bore 17, whereby, in accordance with FIG. 7, a further separation of the base 12 of the container 11 from the steering wheel 16 during inflation of the gas bag 14 is made impossible.
  • the movement of the container 11 or of the gas bag 14 with the base 12 away from the steering wheel 16 is thus restricted by the contact of the head 22 against the inclined surfaces 40 of the snap fastening hooks 21.
  • the position of intended fracture 19 in the embodiment of FIG. 4 is realized in that radially inwardly directed axial ribs 19' are distributed around the periphery in the end region 18c of the snap fastening sleeve 18, and cooperate with the ring step 24 of the holding pin 20 in such a way that the axial holding force of the fastening spigot 26 is transferred via the ring step 24 and the ribs 19' to the snap fastening sleeve 18.
  • the ribs 19' are, however, made so weak in accordance with the invention that upon axial loading in the direction of the arrow in FIG. 7, such as occurs during triggering of the gas generator 13, the ribs are sheared off from the snap fastening sleeve 18. In this way, the holding pin 20 together with the container 11 and its base 12 move upwardly until the head 22 contacts the inclined surfaces 40, and thus a further movement of the holding pin 20 is prevented.
  • both the receiving opening between the snap fastening hooks 21 and also the head 22 to be circularly cylindrical, with the head 22 then contacting a radially inwardly directed ring step or radially inner projections at the snap fastening hooks 21 or spring arms 38 after the gas generator 13 has been triggered and the position of intended fracture 19 has ruptured.
  • the head 22 has smaller diameter than the bore 17 so that it can pass without problem through the bore 17 when the airbag apparatus is snapped into place onto the steering wheel. Furthermore, the diameter of the holding pin 20 must be such designed that it does not prevent the resilient inward deflection of the spring element 38 and of the snap fastening hooks 21.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Air Bags (AREA)
US09/089,486 1997-06-06 1998-06-02 Airbag apparatus Expired - Fee Related US5931492A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19724029 1997-06-06
DE19724029A DE19724029A1 (de) 1997-06-06 1997-06-06 Airbag-Vorrichtung

Publications (1)

Publication Number Publication Date
US5931492A true US5931492A (en) 1999-08-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
US09/089,486 Expired - Fee Related US5931492A (en) 1997-06-06 1998-06-02 Airbag apparatus

Country Status (4)

Country Link
US (1) US5931492A (de)
EP (1) EP0882625A2 (de)
JP (1) JPH1159304A (de)
DE (1) DE19724029A1 (de)

Cited By (48)

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US6039140A (en) * 1998-09-01 2000-03-21 Painter; Robert Theft prevention attachment system
US6106002A (en) * 1998-11-06 2000-08-22 Autoliv Development Ab Air-bag arrangement
US6164684A (en) * 1998-08-31 2000-12-26 Trw Vehicle Safety Systems Inc. Fastening structure for interconnecting parts of a vehicle occupant protection apparatus
US6250666B1 (en) * 1998-03-23 2001-06-26 Breed Automotive Technology, Inc. Airbag housing with horn mechanism
US6257615B1 (en) * 1998-03-23 2001-07-10 Trw Automotive Safety Systems Gmbh & Co. Kg Impact protection device
US6279943B1 (en) * 1998-02-13 2001-08-28 Trw Automotive Safety Systems Gmbh & Co. Kg Steering wheel with airbag guide
US6312012B1 (en) * 1998-03-23 2001-11-06 Trw Automotive Safety Systems Gmbh & Co. Kg Steering wheel with integrated gas bag
US6312011B1 (en) * 1997-10-29 2001-11-06 Mannesmann Vdo Ag Steering wheel having a steering wheel hollow
US6361065B1 (en) * 1999-02-05 2002-03-26 Trw Automotive Safety Systems Gmbh & Co. Kg Air bag module as vibration damper
US6402193B1 (en) * 1999-04-09 2002-06-11 Trw Automotive Safety Systems Gmbh & Co. Kg Steering wheel with airbag module and horn contract
US6457379B1 (en) * 1999-09-24 2002-10-01 Gallino Plasturgia S.R.L. Horn actuating device for a motor-vehicle steering-wheel
US6554312B2 (en) * 2000-06-27 2003-04-29 Toyoda Gosei Co., Ltd. Air bag module mounting structure
US6592141B1 (en) * 1998-12-18 2003-07-15 Delphi Technologies, Inc. Airbag module for motor vehicles
EP1110824A3 (de) * 1999-11-23 2003-07-23 Dalphi Metal Espana, S.A. Anordnung für die Einstellung und die Befestigung einer Airbagmodul-Abdeckung
US20030178832A1 (en) * 2002-03-20 2003-09-25 David Dominissini Airbag tether retainer
US20040004344A1 (en) * 2002-07-05 2004-01-08 Hyundai Mobis Horn switch integrated with airbag module
US20040012177A1 (en) * 2002-05-16 2004-01-22 Takata-Petri Ag Airbag module with elastic mounting of the gas generator
US6682092B2 (en) 2000-12-20 2004-01-27 Trw Automotive Safety Systems Gmbh & Co. Kg Vehicle steering wheel
US6695343B1 (en) * 2000-11-20 2004-02-24 Trw Vehicle Safety Systems Inc. Snap-in air bag module
US20040041373A1 (en) * 2002-08-27 2004-03-04 Trw Automotive Safety Systems Gmbh Gas bag module and method for assembly of a gas bag module
US20040041372A1 (en) * 2002-08-27 2004-03-04 Trw Automotive Safety Systems Gmbh Gas bag module
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EP1348595A3 (de) * 2002-03-29 2004-05-26 Delphi Technologies, Inc. Hupenschaltervorrichtung für Airbagmodul und diese enthaltendes Lenkrad
US20040130131A1 (en) * 2003-01-07 2004-07-08 Thomas Scott David Styling flexible driver air bag module and method of making same
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US6851710B2 (en) 2001-03-06 2005-02-08 Autoliv Asp, Inc. Apparatus and method for rapid airbag component installation
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US20050116452A1 (en) * 2003-08-14 2005-06-02 Hyundai Mobis Co., Ltd. Horn switch assembly for vehicles
US20050200104A1 (en) * 2002-02-08 2005-09-15 Xiaoping Xu Switch assembly for an airbag module attachment
US20050230943A1 (en) * 2004-04-20 2005-10-20 Thomas Scott D Vehicle air bag module retention system
US20050253364A1 (en) * 2002-06-07 2005-11-17 Rainer Wallentin Electrically insulated fixing device for an airbag module
WO2006029780A1 (de) * 2004-09-16 2006-03-23 Autoliv Development Ab Lenkradeinheit
US20110204602A1 (en) * 2010-02-23 2011-08-25 Judco Manufacturing, Inc. Airbag frame apparatus
US20120242064A1 (en) * 2009-12-08 2012-09-27 Steffen Weigand Vehicle steering wheel
US20130106082A1 (en) * 2011-10-31 2013-05-02 Masakatsu Uehara Airbag device
US8511707B2 (en) 2008-12-02 2013-08-20 Takata Corporation Driver-airbag-apparatus-attaching structure and steering wheel
US8616577B1 (en) * 2012-10-19 2013-12-31 Autoliv Asp, Inc. Steering wheel vibration damping system
US8939466B2 (en) 2010-02-23 2015-01-27 Judco Partnership, Llc Airbag frame apparatus
JP2016199183A (ja) * 2015-04-13 2016-12-01 タカタ株式会社 ステアリングホイール
US10166944B2 (en) * 2014-10-24 2019-01-01 Toyoda Gosei Co., Ltd. Air bag system
US10196028B2 (en) * 2016-03-29 2019-02-05 Nihon Plast Co., Ltd. Steering wheel
WO2020229615A1 (de) * 2019-05-15 2020-11-19 Joyson Safety Systems Germany Gmbh Schwingungsdämpfersystem für eine lenkradanordnung eines kraftfahrzeugs
US11180178B2 (en) 2018-03-19 2021-11-23 Ashimori Industry Co., Ltd. Steering wheel
US11267424B2 (en) * 2018-07-11 2022-03-08 Autoliv Development Ab Damper mechanism of steering wheel and steering wheel apparatus for vehicle
US11305716B2 (en) * 2018-01-19 2022-04-19 Autoliv Development Ab Steering wheel
US11305715B2 (en) * 2018-11-13 2022-04-19 Hyundai Mobis Co., Ltd. Driver airbag device
US20230027744A1 (en) * 2021-07-21 2023-01-26 ZF Passive Safety Systems US Inc. Vibration damper for coupling an airbag module to a vehicle steering wheel

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DE202004005994U1 (de) * 2004-04-08 2004-06-24 Takata-Petri Ag Vorrichtung zur Verbindung eines Airbagmoduls mit einem tragenden Fahrzeugteil
JP4799230B2 (ja) * 2006-03-16 2011-10-26 マツダ株式会社 自動車のステアリングホイール構造
JP5109541B2 (ja) * 2007-09-11 2012-12-26 タカタ株式会社 ステアリングホイール組立体
KR20090050680A (ko) * 2007-11-16 2009-05-20 현대모비스 주식회사 스티어링 조립체
DE102014002025A1 (de) * 2014-02-13 2015-08-13 Autoliv Development Ab Lenkradeinheit mit einem Lenkradkörper und einer am Lenkradkörper gehaltenen Gassackeinheit

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EP0882625A2 (de) 1998-12-09
JPH1159304A (ja) 1999-03-02
DE19724029A1 (de) 1998-12-24

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